Anti-abrasion device for pump cylinder of oil well pump

The invention relates to the technical field of underground protectors, in particular to an oil well pump barrel anti-abrasion device which comprises an outer connecting pipe and an inner anti-abrasion sleeve, and an oil pipe connecting structure used for being connected with the lower end of an oil pipe and a pump barrel connecting structure used for being connected with the upper end of a pump barrel are arranged at the two ends of the outer connecting pipe correspondingly. The inner anti-abrasion sleeve is located in the outer connecting pipe, a limiting structure for limiting the inner anti-abrasion sleeve in the direction facing the pump cylinder connecting structure is arranged on the outer connecting pipe, and the inner anti-abrasion sleeve is provided with an anti-abrasion sleeve center hole for a first section of sucker rod above the oil well pump plunger to penetrate through. The centralizing anti-abrasion function can be achieved on the middle portion of the first section of sucker rod at the posit